单项选择题

The most effective complaint can be made by ______.

A．showing the faulty thing to the producer
B．explaining exactly what is wrong with the thing
C．saying firmly that the thing is of poor quality
D．asking politely to change the thing

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单项选择题

Nick Rose and Jordan Mayo set up their website for the purpose of ______.

A．helping students to cheat in exams
B．helping students to improve their writing
C．making money to pay for their schooling
D．making their teacher free

单项选择题

It can be inferred from this passage that ______.

A．students who visit the website "revise. it" are all lazy
B．students in Oxford University are all lazy
C．websites in Oxford University are all set up by students
D．websites can provide people with different kinds of information